| 摘要 |
PROBLEM TO BE SOLVED: To provide a reduction gear capable of providing high deceleration by a simple structure.SOLUTION: A reduction gear includes an input rotating body 3 which is rotatably supported on the housing 1 side and has a sun engagement part 23, a planetary rotating body 5 which is meshed with the sun engagement part 23 of the input rotating body 3 at a first planetary engagement part 29, has a second engagement part 31, and can be relatively rotated, and an internal rotating body 7 which is meshed with the second planetary engagement part 31 of the planetary rotating body 5 at an internal engagement part 35 and can be relatively rotated. The sun engagement part 23 of the input rotating body 3 is configured as a worm engagement part 23, the first planetary engagement part 29 of the planetary rotating body 5 is configured as a worm/wheel engagement part 29 which engages with the worm engagement part 23, and the engagement of the second planetary engagement part 31 of the planetary rotating body 5 and the internal engagement part 35 of the internal rotating body 7 is configured as a screw engagement. |
